>What other examples of laws outside of finance can you cite where individuals are restricted in order to protect them from other bad actors?
Pretty much any consumer safety or mandatory licensing law.
Even something as simple as buying a beer - we insist that legal adults are not allowed to buy a beer until they are older.
We insist that adults must be over 21 to buy a handgun in many states, or that (in other states) they must show that they are sophisticated gun owners by passing a firearms safety course.
We let people with special licenses and training (pharmacists) buy opiates openly, yet deny individuals the right to do so without receiving written permission.
We don't allow non-specialists to buy certain kinds of explosives, but we allow others with credentials to do so. The same applies to all kinds of things, up to and including varieties of river frogs (!).
We insist on documented "informed consent" for things like surgery, again to protect vulnerable people from bad actors.
We don't let adults buy many kind of fireworks out of fear that they will harm themselves or others, yet if someone can prove (through obtaining a license) that they are competent, we let them buy and fire huge commercial fireworks.
In short: there are an enormous number of similar restrictions. A lot of them exist because the previous state (no law) caused enough damage that restrictions were added.